Changes around us
ಈ ಪುಟವನ್ನು ಕನ್ನಡದಲ್ಲಿ ನೋಡಲು ಇಲ್ಲಿ ಕ್ಲಿಕ್ ಮಾಡಿ
Objectives:
- Identify a chemical or physical change based on macro and micro observations.
- Recognize that the same object can undergo both chemical and physical changes
Process:
Explore the simulation: https://interactives.ck12.org/simulations/chemistry/campout/app/index.html?lang=en
As you explore the simulation, answer the following questions.
1. Fill in the table below with all the chemical and physical changes in the simulation
| Chemical changes | Physical changes |
|
|
2. How can you use chemical formulas to determine if a change is either chemical or physical?
3. How do particles differ after a physical change?
4. How do particles differ after a chemical change?
5. If the metal stake broke instead of bent, would it be a chemical or physical change? Explain your reasoning.
6. Do you think glass breaking is a physical or chemical change? Defend your answer.
7. Your friend says, “Chemical changes are caused by an input of energy. In physical changes, there is no transfer of energy.” Is your friend correct? Why or why not?
Explore the simulation: https://interactives.ck12.org/simulations/chemistry/phases-of-matter/app/index.html?lang=en&referrer=ck12Launcher&backUrl=https://interactives.ck12.org/simulations/chemistry.html
1. Does the temperature of the water rise while it is boiling?
2. When you boil water, why does the level of liquid decrease?
Question for thought : How do you think these resources useful for teaching the concept of physical and chemical change? Explain.